253634901919 has 4 divisors (see below), whose sum is σ = 289868459344. Its totient is φ = 217401344496.

The previous prime is 253634901889. The next prime is 253634901943. The reversal of 253634901919 is 919109436352.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 253634901919 - 2⁷ = 253634901791 is a prime.

It is a super-2 number, since 2×253634901919² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253634901019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18116778702 + ... + 18116778715.

It is an arithmetic number, because the mean of its divisors is an integer number (72467114836).

Almost surely, 2^253634901919 is an apocalyptic number.

253634901919 is a deficient number, since it is larger than the sum of its proper divisors (36233557425).

253634901919 is an equidigital number, since it uses as much as digits as its factorization.

253634901919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36233557424.

The product of its (nonzero) digits is 1574640, while the sum is 52.

The spelling of 253634901919 in words is "two hundred fifty-three billion, six hundred thirty-four million, nine hundred one thousand, nine hundred nineteen".